Build with the Unstoppable Domains User API
Build out your custom domaining workflow and stack with our user API.
Hassan Ali ·
Author
Hassan Ali
Principal Engineer
Hassan is a Principal Engineer at Unstoppable. He works on the infrastructure behind domain and DNS resolution, and writes up the protocol details most guides skip.
Manage Your Domains From the Terminal: Introducing the Unstoppable Domains CLI
Buy domains, manage your portfolio, list for sale, generate landing pages and more with our new CLI tool.
Hassan Ali ·
How to Connect Your Domain to Shopify: A Clear Step-by-Step Guide
Connecting your existing domain to a Shopify store is simple once you know the DNS steps. Here is a clear walkthrough plus troubleshooting.
Hassan Ali ·
Forward Lookup vs Reverse Lookup DNS: A Simple Guide
The differences between forward and reverse DNS lookups, when to use each, and how the two work together to power internet communication.
Hassan Ali ·
Anycast DNS Explained: The Hidden Engine Powering Internet Speed
This guide explains everything you need to know about anycast DNS, from its routing mechanics to its security benefits and operational realities.
Hassan Ali ·
Engineering Update: Reliability, Stability, and Performance Enhancements
A look at the reliability, stability, and performance work our engineering team shipped to make the registrar faster and more dependable.
Hassan Ali ·
DNS Failover: How DNS Keeps Services Online During Outages
DNS failover is a routing safeguard. When a server, data center or region goes unreachable, DNS sends users to a backup destination instead.
Hassan Ali ·
DNS Load Balancing Explained: From Basic Setup to High Availability
DNS load balancing spreads visitors across multiple servers through the Domain Name System, so traffic spikes do not take your site down.
Hassan Ali ·
How DNS Works Step by Step: The Hidden Path of Every Web Request
Ever wondered how your browser instantly knows where to go? Here is the step by step path every web request takes through DNS.
Hassan Ali ·
Domain Name System (DNS) Lookup
DNS is the internet's address book, mapping names to addresses so you never have to memorize numbers. Here is how a DNS lookup actually works.
Hassan Ali ·
DNS Cache Secrets: Hidden Features Most Admins Miss
DNS traffic operates at a massive scale. Without DNS caching, this massive traffic would crush authoritative servers and bring web browsing to a standstill.
Hassan Ali ·
Recursive DNS vs Authoritative DNS: A Plain-English Guide for IT Pros
How recursive DNS works, how it differs from authoritative DNS, and why IT pros managing network infrastructure should understand both.
Hassan Ali ·
DNS Zone Files: A Practical Guide for System Administrators
DNS zone files have powered domain management since 1987. Here is how they are structured and how administrators use them day to day.
Hassan Ali ·
What Is a Second-Level Domain (SLD)? A Simple Guide
A second-level domain (SLD) is the part of a domain name that sits directly to the left of the top-level domain in the DNS hierarchy.
Hassan Ali ·
What Is a Top-Level Domain (TLD)? A Simple Guide
A top-level domain is the final segment of a domain name after the last dot. In example.com, the .com portion is the TLD.
Hassan Ali ·
How to Master DNS Troubleshooting: A Simple Guide That Actually Works
DNS converts human readable names into IP addresses. Understanding how that works is the first step to troubleshooting DNS problems that actually stick.
Hassan Ali ·
12 Critical DNS Errors That Can Break Your Website (+ Quick Fixes)
When DNS works, email and browsing just work. When it breaks, you get downtime, slow pages, failed connections and security gaps.
Hassan Ali ·
What Is DNSSEC? The Complete Guide to Securing Your Domain
Your domain's security depends on a system designed when the internet was smaller and threats were simpler. DNSSEC changes that equation entirely.
Hassan Ali ·
DNS Propagation Explained: How Long It Takes and How to Make It Faster
DNS propagation is how long record changes take to spread across the internet. Most finish within 48 hours, and some need up to 72.
Hassan Ali ·
Domain vs Subdomain: Key Differences and When to Use Each
Domain or subdomain? The choice shapes how people find you and how search engines read your site. Here are the differences and when to use each.
Hassan Ali ·
What is WHOIS Lookup? The Hidden Truth Behind Domain Searches
WHOIS shows who owns a domain and how to reach them, plus registration history you can check before making an investment.
Hassan Ali ·
How to Transfer a DNS Domain: A Step-by-Step Guide
Domain transfers can save money or improve service. Knowing what happens during a transfer helps you decide about your digital assets.
Hassan Ali ·
What is an MX Record? A Simple Guide to Email Server Configuration
MX records tell email delivery agents exactly where to send your mail. Here is how these DNS entries work and how to configure them correctly.
Hassan Ali ·
TXT Records Explained: The Hidden Power Behind Domain Security
TXT records now anchor domain security, powering SPF, DKIM, DMARC, and domain verification against spoofing and phishing.
Hassan Ali ·
CNAME Records Explained: From Basics to Expert Tips
CNAME records act as aliases that point one domain to another instead of to an IP address, making subdomain management much simpler.
Hassan Ali ·
What Is an A Record? A Complete Guide to DNS A Records
How DNS A records work, how to add one, and how they compare to CNAME and TXT records, explained in plain English.
Hassan Ali ·
DNS Records Explained: A Beginner’s Guide to A, CNAME, TXT, and More
A beginner's guide to DNS records. Learn what A, CNAME, TXT and MX records do, and how to use them to control your domain's behavior.
Hassan Ali ·
DNS Explained: What You Need to Know
DNS powers far more than web pages. It underpins email, cloud apps, gaming, streaming and IoT. Here is how the Domain Name System actually works.
Hassan Ali ·
Unstoppabledomains.com Is Back And Stronger Than Ever – Your Data Is Secure
Our website unstoppabledomains.com and communications from @unstoppabledomains.com are secure and fully operational.
Hassan Ali ·
Why We Migrated to Launch Darkly for Feature Flagging
In this post, we’ll discuss why we made the switch and how we’ve benefited from using Launch Darkly.
Hassan Ali ·
Security Incident at Our Email Vendor
Our email vendor Customer.io had a security incident that exposed some subscriber email addresses. Our own systems were not affected.
Hassan Ali ·